Rochester Weather Forecast

    • 53
    • 85

    Sunny

    • 51
    • 76

    Mostly Sunny

    • 51
    • 75

    Mostly Sunny

    • 52
    • 76

    Partly Sunny

    • 55
    • 68

    Chance Rain

    • 53
    • 70

    Chance Rain

Today 16 Sep Lowlands of Lewis and Southern Thurston Counties

Sunny. Highs in the mid 80s to lower 90s. North wind to 10 Mph becoming southeast in the afternoon. Gusts to 20 Mph.

Tonight 16 Sep Lowlands of Lewis and Southern Thurston Counties

Clear. Lows in the lower 50s. South wind to 10 Mph with Gusts to 20 Mph becoming west after midnight.

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Rochester Temperature Statistics

September Temperature

Chehalis-Centralia Airport (11.2 miles)

  • Lowest 8 September, 2025

    50 °F

  • Average September

    64.4 °F

  • Highest 3 September, 2025

    86 °F

Climate (2020–Present)

Chehalis-Centralia Airport (11.2 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    52 °F

  • Average High 2020–2025

    61.3 °F
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